symious opened a new pull request, #5863:
URL: https://github.com/apache/hadoop/pull/5863
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### Description of PR
In current's RPC design, if Server sends an exception back, Client can only
rebuild the exception according to the original exception's error message, if
the exceptions has some fields containing important information, they will be
discarded since we can not rebuild them based on message string easily.
This ticket is to introduce a new interface for Exceptions which supports
reconstructing. If Clients want to rebuild the exception, they can just
implement the methods and the reconstruction will be done automatically.
The interface uses String[] as parameter for simplicity. I thought of using
Protobuf to store all the exceptions or fields, but the generacity can not be
perfectlly met. So we need Client to support it by accepting "String[]" and
transform the String to it's original type.
JIRA: https://issues.apache.org/jira/browse/HADOOP-18816
### How was this patch tested?
unit test.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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